Silly question, and ignore this if you've tried it; did you ever figure out how to reset the CMOS, and did you try that? Remember to disconnect the power and remove the CMOS battery before doing a reset. If it's a jumper remember to replace the jumper to the original position before you put the battery back in and power on your system.

EDIT: I just mentioned that because I've actually had a problem resolved before by doing a proper, battery out, 30 second hold rest before, when initially I thought I'd reset it properly.